Chimney pit door



March 4, 1958 A. P. ROBINSON 2,3%,433

. CHIMNEY PIT DOQR med Jan. 24, less fl/.BERT P. 1905, N SON HTTO/ENEY CHIMNEY PIT DOOR Albert P. Robinson, Seattle, Wash.

Application January 24, 1955, Serial No. 483,748

Claims. (Cl. 189-46) This invention relates to chimney pit doors, and more particularly to improvements in the details of construction of the chimney pit door of my U. S. Patent No. 2,570,714 which issued on October 9, 1951; such doors being functionally applied to the clean out openings of fireplace chimney pits, or ash pits, as provided for the removal of ashes, and which in some instances are located atthe outside of the building.

It is the principal object of this invention to provide a chimney pit door and frame therefor that may be set within the clean out opening of the chimney or ash pit wall, and which, by reason of novel features of construction embodied in the frame and door, and their particular method of assembly, will permit easy opening or closing movements of the door, but will prevent any possible dsplacement thereof from the frame, once the parts are assembled and properly installed in the pit wall.

It' is a further object of this invention to improve upon the device of my above identified patent by the provision of means at the lower opposite corners of the frame for holding the door in its closed position in lieu of the i previously employed single and centrallylocated tongue.

Yet another object is to provide a frame and door combination that may be set well within the wall Opening without any interference to the opening or closing movements of the door, and gaining the advantage of there being no parts projecting from the face of the wall.

Further objectsV and advantages of the invention reside in the details of construction and combination of parts of the device with each other, and in the particular relationship thereto of the top wall surface of the opening in which the frame is mounted whereby the door is prevented from-being removed or dsplaced from the frame after the assembled door and frame have been properly mounted in the wall Opening.

In accomplishing the above mentioned and other objects of the invention, I have provided the improved details of construction the preferred forms of which are illustrated in the accompanying drawings, wherein:

' Fig. 1 is a perspective view showing the ash pit door and frame combination of this invention, and ill-ustrating their disposition within the clean out opening of an ash pit.

"Fig. 2 is a front elevation of the door frame with the door removed therefrom.

Fig. 3 is a horizontal section of the frame taken on the line 3-3 in Fig. 2.

Fig. 4 is a perspective view of the door removed from the frame, and as seen from its front side.

Fig. 5 is an enlarged, fragmentary view, in perspective, showing the specific means provided at a lower corner of the frame for holding the door in a closed position.

IFig. 6 is a Vertical section taken through the frame and door as applied to a wall Opening, showing the door in open position and illustrating the details of the door and frame construction that characterize this invention.

Fig. 7 is a view, showing in vertical section details of I United States Patent O ICC the upper and lower corner portions of the door and frame.

Referring more in detail to the drawings:

The present device comprises two parts, namely, a door Which is herein designated in its entirety by reference numeral 10, and a door frame which is designated in its entirety by numeral 11. A feature of the present invention resides in the provision of co-acting means on the frame and door whereby the door, after being applied to the frame 11, and the frame properly set within a wall opening, cannot be dsplaced from the frame, yet can be freely moved between closed and open positions.

The frame 11 as shown in Fig. 2, is of rectangular form, and is made as a one-piece, metal casting. lt comprises substantially flat top and bottom walls 12 and 13, in parallel horizontal planes, and flat opposite sidewalls 14 and 15, in parallel Vertical planes. 'Ilhese walls preferably are tapered slightly in thickness flom outer to inner edges due to the tapering of similar parts of the mold as required for its easy withdrawal from the sand. It is shown in Figs. 2 and 4 that a flange 16 is formed integral with the top wall, depending downwardly therefrom, fiush with its forward edge. Also, it is seen best by reference to Figs. 2 and 4, that Vertical ribs 18-18 are formedon the inner faces of the sidewalls, spaced inwardly from and parallel to their forward edges a distance equal to the thickness of the door lt). Each of these ribs terminates at its upper end a slight distance :below the level of the v lower edge of the fiange 16, thus to leave passages, as designated at 19 in Fig. 2. Likewise, the ribs 18 terminate at their lower ends short distauces above the lower wall of the frame, as has been shown in Fig. 6.

Formed integrally with the frame at the opposite lower corners and front thereof are lugs 20-20 of the specific form shown in perspective'view in Fig. 5. It is to be noted in that view that each lug extends inwardly from the corresponding sidewall and somewhat into the frame passage and also that its projects slightly above the level of the bottom Wall 13. Also, it is shown that each lug includes at its outside, an npwardly projecting stop flange 22, at the inside of which flange the lug body forms a horizontal, upwardly facing seat 23. The ribs 18-18 as formed on the opposite sidewalls of the frame terminate above and inwardly from the seats 23, as noted in Fig. 6, and it will be also noted in that view that the forward Vertical edge of the bottom wall 13 of the frame is flush with the Vertical plane of the forward faces of the ribs 18-18.

The door 10, as seen in Figs. 4 and 6, is a substantally flat, one-piece casting of rectangular form of a Width designed to be received between t-he opposite sidewalls 14 and of the frame for sliding movement in the passagesl 19-19 between an open position, in which it is shown in full lines in Fig. 6 to its closed position, as seen in Fig. 1. The top edge portion of the door plate is inwardly offset by a bend designated at 30, a distance equal to the thicltness of the flange 16 that is formed across the front of the frame at the top, and at its opposite side edges, at the top, the door plate is formed with rearwardly extending semi-circularly rounded ears 32-32 which will prevent the door from being pulled forwardly from the frame.

The door is of such height that it will completely close the front Opening of the frame when in closed position, and it is to be understood that when it is in its closed position, its rearwardly oflset upper edge portion 10x will overlap with the fiange 16, .at the inside thereof, as shown i in dotted llines in Fig. 7, and across its lower edge portion will engage flatly against the front surface of the bottom wall 13 of the frame. Also, when closed, the door will engage along its opposite side edge portions with the front faces of the ribs 18-18.

The means provided for holding the door in its closed f I frame into messa pit.

Vdriavlalfif the-door.V When the door is shfted to any i openposition, its Vinner endt-portionr will overbalance its outer-portiomand itwill fretain 7itself at that-position, as willbevunderlstood'byrreference toFig. 6, wherein` it: 50

' tailsh'eren shown, provide' a` practical, 'ash tight elosure;v

position `willjnow be described; i theseVV parts constituting rhprovernents upon the dvice of my prior patent previ- V ously referred to. ;At its opposite lower Corners, the door .plate is, forme d.with,square cut.recess es, asratfiflfll Fg'; 4, which'permit' this lower 'e'dg'e portion of the cloofth i vupon its closingobe :receiyed between the lugs,` ..to engage i flatlyl against, 'the fr'ont, edg'e 7surface offjthle .bottom wall v ljfofthe Vframe. Alsb, it`l isffa feature of ths construction f that t'h'e'jtop edgefportions of the7 recessest/tl are inwardlyjandfdownwardlybeveled,tas shown at A6 in Figs; 4 and. 5710V f 71,50:thatstheyfcan/jbe easily. received vback 7of the lug'7 i flanges 22,422.` Centrally 'of its loweredge portion; thexv 7door Vmais 7farmed 'wjithla forwardlyjdirected ear or .fiange t V4'5fvichijcl1'maybeused as aV fingerholdiiforiliftngjthe f closedfidoor tojan openipositionpand which'ear'ineidentalfj V157 7ly serves as alfstop member,V engageable with'flange 16,'as I shown'in" Eigti to .preventfthe open door from being. x

' accijd'e'ntallyi-ippsh'edfrearwardlyV and ltdroppedjfrorn the i At it'sgopposit'efupper Corners, and at opposite ends'of20 the' front 'face of' flange 16,.the Vfl'arne'has lugs7 Sil-450? castithereon. These project from the faceof the frame to'theisame'extent 'as the flanges 22 vof the lugs 2%, and serveiwith the latter .Whenriframes :oflthis kind'arefhorb. -zontallyjstaeked for storage or shipping, to'retain them V25 from beeomingrout 'of stacked'a'lignment. i

i 7Iiifithe installing Vof thepresent device, theVframe-an'd gdcorrare first properly assembled, =as (shown in Fig;v 1.;

Todo jthis Vthe "doorfis" brought to the inwardlyidirected7 andiupwardly inclined position iniwhchnit is shown in dottedilines'injFigfl, andiiskprojected through the :framer t passage from :inside to outside,l by sliding its side' edge pirrtions'through7 the passages`19-19- When the .ears 32-32 engagewith` theinside of 'the'ribs 18,'the. door'- t can'lthen: be` 7swung f downwardly` .to Vits closed i position of 35 Fig. 1. This applying ofV the door to the'frame beingl done VVbefore the Vn'iasonry hasbeen built across :the'top of the frame; i' Usuallyithe bri-ckworkjor masonry of the wall is7 built around the frame 11 to the extent shown infFig; l7 i before the fdoor; Vis applied, and the frame is inset aninchV '40 or two from -the face of they/all, as has been shown in Fig.i 6.v When.. thezframe isffully enclosed, it is then im-r possible r-tc }rem ve the V'door from thefrarn'e: dueto the fact that it cannotV be swung high enough 'at its ii'inerend,V due'vtofgtbelmasonry7 across the'top of the openingyto causefthe ear toyclearithe'fiangefl for inward with-.

is Vobservedthatthe door 'rests uponthe' npper end pen.

` tions of the ribs 184-13 sand; against the under edge' of the'flange 16.1 To close the door, it is'pulled forwardly, i i andthen s'wung downwardly, and is slightly liftedto cause.4

the beveled 'edgetsurfa'ces44 at its Vopposite eorn'ersitoV` passlinwardlyacrosstheflanges 22.v Then the doorv is lowered to'eause the beveledsurfac'es 41 tovengage with` and.s1ide^;down against 'the inner lf'acesfof the -lugv flaingesfi 22:.and1cometto -restfion shoulders 23:.v Thus the-door is' supportedf and held closedV tightly against'flthe7 ilangesio 18`--18,aswell as 'against the front surface of .wall 13. I

Such 1devicesfas this; made in aecordance'rwith the 7defways;V i

t HavingA thusvv describedl rny inventon', what I iclaimf as new:- thereinitan'l 'Jdesire toV -secure I bylLettere -Vtl'atentz isi- 5 112 A chiinney pit'door structure'compris'ing in-combii i nation',` a frame'having opposite sidewalls, a top wall and afbottom-:walh saidtop walll being formedgacross its for-V i 70 that'isfeas'yto. apply, easytovu'se, and satisfactory;in'alljl Ward edge witha depending-flange, -doorstops extending" H i aisamsst; 7f

saidfidepending'flange and'said'door-is -fornfiedkatio i saidj'door is' adapted tov close along its-lower edgeflagainst* rtheifron't'of said bottom Vwall of the frame andfsaid'floor `doonwheninelosedposition.x i f Vi i 4.=A-chinmeyVpitdoor'structure 'comprisingincomfg i' said :depending flangefdoor'fholding lugsiformedlonjth 7frame at lthe frontv edgei'ofgitsoppopsite corner,-.porti ;-`ns,xv

` and-'said door being adaptedfiforipivotal and ;slidi ng;su

-7 are closedtagainst the stop'railsandaitsloweredge f havingftheirgtop: edge defini'ng4 portionsadapted to 'e i i 141.; i verticallyL along I and projectng i from* the inside surfacesr; f a: of saidopposite'sidwlls'andvterminating at theirupper: i ends slightly, below the levelof the lower edge oftsaid depending fiange', a door holding lug'formed on the frame 1 i 7 at the front edge of the 'lower wall thereof .outs'et from.

the plane of said-steps7 and projecting slightly; above the' planeV of the bottom* wa1l,\ andraV door fitted to the frame between said opposite 'sidewa1ls, and having its upper edge i portion disposed backiof said 7depending-fiange, and said'f) door being engaged aloiigfits side'efldges against the frontfi sides of said tdoorfst'o'ps;;and::having"a'lower-:edgecorner i portion thereof disporsredV back of .said 7door holdingilng 'toV t retain-the door in its closed position; said door pb'eirigiperfl mitted limited upwardimovement,iwheiiciosee, m' lift said lower edge portion free of said door holding'ilug for its g outward and upward swinging to an open posritionyja'nd:7 7said door 'being slidable inwardlyi or -ou'tVwardly,'acrossV saiddoorstops/whenvin its open positionsV i v i V2.;A` chimney. rpit door'structure 'as recitedlinfclaim 1: wherein 'said stops are 'insett'rfrom' the verticalvplanef-o' 'i sit endsv oflits' top' edge :with ears for -engagingg said; 00 stopsvtol limit the extent of outward'slidingmovernent'fo I the door when'in open position and near its'loweredg formed with a'forwardly'projecting eargadaptedtoen'ga'g f' i i withthe depending flangeto limitthe inwardsli ment of the'door wheninjan open position. U v i 3. A- chimney pit'l door structure -as in'claini-2-Lwphr'eini77 u h'oldingfll'ugV extendsabovethe level of the' bottonit-jwall` V VVofl/the ffame'iirnmediately adjacentajsidewall'of tl'ieframe; e

Vand -saiddoor isrgformedtwithj'a corner :notch forclearing'jv i Vthellugain Aopening or closing`` the door; and jsaid flu'gfis f formed at itsinside:withanflupwardly'facingiseat againstw i t whichth'e top :edge Jofjsaid =notchi engages :to support the; i

binaton, a rectanglular ldoorfrarne havingV oppositefsid i wallsyaftop-wallfand a'lbottom-wall; said .top vw`allibeingf-;'' i

formedAV across fits forward edge; with depending lflange,7 f i vstop .rails formed on the insidersurfaces ofssaidsidewalls;

and terminasingat theiri upperlendsgbelo-w r:the `leveloiiV ir outsetfrom theQplaue ofsaidr'fdoor vstopszand extended t abovefthelower(wall, a door fitted to .the frarriejbetweenir ltsopposite,sidewallshavingits'upp'eredgetportiontins; i

wardlyloifset and disposed'back* of sailzdependingiflangc,

port 7on fthe gupper ends-of said rstop:railsflwherr7 its low` edge iS-Swlmggupwardly; -andfoutwardly :toppen xrwsitio. i i' i i and'said 'door having notchesY-formed thereinjatiitsflowe i cornerportions permitting`-thelower edge of thedoorgto f i swmg past said `.lugstojapositio'n at which'its sidve'fedgesiV against the.forwardedge7 of said bottom wall;' said Vno re'cyveiyed baekiof positiinzip'` 5.1A' combinationV as in claim '4 wherein Vthe ltop edge:V i definingportion Qf each notch is inwardly and downwarpdt i 'the saia'tiiugsto hemme doprjiazciesea;

' ly beveled' to effect inwardfwedgng pressure whelzlthaftT i 

